Metal-working machinery



Feb.5 1929. 1,760,967

` H. BAERBALCK METAL WORKING MACHINERY m VII/I4 Feb. 5, 1929. 1,700,967

H. BAERBALCK METAL WORKING MACHINERY Filed D60v 20. 1926 2 Sheets-Sheet2 /N VE N TOR.

Patented Feb. 5, 1.929.

UNITED STATES PATENT OFFICE.

HANS .'BAERBALCK, OF CINCINNATI, OHIO, ASSIGNOR TO THE AMERICAN TOOLWORKS COMPANY, 0F CINCINNATI, OHIO, A CORPORATION OF OHIO.

METAL-WORKING MACHINERY.

Application led December 20, 1926. Serial No. 155,965.

My invention relates to metal working machinery, especially to suchmachinery employing an adjustable crank for operating a reciprocatingelement, such as the tool-ram of a metal shaping machine, and myinvention is exemplified as employed in connection with such use. Insuch machinery the crankof the power transmitting crank member isadjustable toward and from the axis of rotation of the crank member inorder to adjust the stroke of rcciprocation of the tool-ram.

It is the object of my invention to provide novel means for maintainingsuch adjust ments during operation of the machine, and to provide novelmeans for readily releasing such maintaining means by manipulation of anadjusting tool or wrench for effecting such adjustment.

The invention will be further readily understood from the followingdescription and claims, and from the drawings, in which latter:

Fig. 1 is a vertical axial section of my improved device, taken in theplane of the line 1 1 of Fig. 3, and partly broken away.

Fig. 2 is an enlarged axial section of a detail of my .improved device,showng the operating tool and release of the maintaining clutch thereby.

Fig. 3 is a cross-section taken in the plane ofthe line 3 3 of Fig. 1,partly broken away.

Fig. 4- is a cross-section of the same, taken in the plane of the line444 of Fig. 1.

The shaping machine exemplified comprises a usual frame 11. on whichthere is an upper guidewav 12. A tool-ram 13 is reeiprocated lengthwisein the guideway` and is arranged to carry a usual tool-holder at its endfor receiving the tools. The ram is reciprocated by a usual rocker-arm14` pivoted at its lower end on a shaft 15, supported in bearings 1 6 inthe frame. The upper end of Vthe 1ocl er-arni is articulated at 17 witha linlr 18. which latter if; articulated at 19 with a nul-block 20.

The nut-block is adiustable lengthwise of the ram by means of ascrew-rod 25, threaded in the nut-block. the nut-block being clamped inadjusted positions to the ram by means of a handle in usual manner, forpositioning the path of stroke of the tool-ram.

The rocler-arm is provided with a usual longitudinal guideway 2f). inwhich there is a slide-block 20. which forms a bearingrjl'or ihrcranlopiii 31 journalerl therein. The

crank-pin is on a bull-wheel 32, suitably rotated at selective speeds,as by having a suitalilc drive pinion driven at selective speeds meshingwith the gear teeth 33 thereon.

The stroke of the tool, that is, the distance which the tool moves ateach reciprocation of the rocker-arm 14, is governed by the position ofthe crank-pin 31 with relation to the axis of rotation of' thebull-wheel. The adjustment of the crank-pin is effected by mounting thecrank-pin on a slide-block 35, which is adjustable lengthwise in aguidewav 36 in the bull-wheel. The block 35 has a threaded bearing 37,an adjusting screw 38 being threaded therethrough.

The adjusting screw is journaled and held endwise in a bearing 39 on thebull-wheel, and is rotated by a bevel pinion 4() fixed thereon, withwhich a bevel pinion 41 meshes. The bevel pinion 41 is fixed on anadjusting shaft 42.

The hub 45 of the bull-wheel has a bushing 46 therein, which is fixed tothe bull-wheel by a screw 47, so as to rotate with the bullwheel. Ablock 48 is fixed to this bushing, as by a positioning screw 50, betweena hub 51 of the block and the bushing.

The hub of the bull-wheel is rotatable in a bearing 54 of the frame ofthe machine, in which a bushing 55 is located. A bearingsleeve 56 isfixed to the bearing 54 by screws 57, the bearing-sleeve having anannular fiange 58 through which the screws are received. The flangespans the outer end of the hub of the bull-wheel, and the bearingsleeveforms a bearing for the outer end of the bushing 46 fixed t0 thebull-wheel. The bull-wheel is held endwise in the bearing 54.

A housing 61 comprises an inner section 62 and an outer section 63connected by screws 64. It has a bearing 65 about the bearingsleeve 56and a sleeve extension 66, which latter forms a housing for theindicating means to be presently described, which indicating means are,however, not part of the present application, the same being shown,described and claimed in a separate application filed by me in theUnited States Patent Office December 20th, 1926, the same being SerialNo. 155,964.

A shell 69 has a fiange 70, by means of which it is secured, as by bolts71, to the block 48, so as to rotate with the bull-wheel. A bushing 7 2is received about a hub rtion the block 48 about. the shaft 4.2, and isloaated the outer end portion otl the adjusting shat't 'with alongitinlinal spline groove T6, in which a key T7 is recei ved, thecollar being' provided with a. comj'ilemcntal grcaivc T8 lor recei.'ingthe key.

The outer periphery ot the collar is provided with screw threads T9, andthe inner peripheiwv ol' the shell Q9 is provided with internal threadsSt) compleuicntal to the threads 79. When the adjusting` shaft isrotated, the collar T5 rotates therewith, and, by means ot a threadedconnection ol the inner periphery ot the relatively stationary shell(it). the collar T5 is also moved cndwise along the adjusting shat't.

A ring 5%?) is connected with said collar and moves endwise with saidcollar. This ring is shown received in an annular groove 84 in thecollar. The collar is provided with a removable section which forms onewall ot said groove, so that the ring may be received in the groove andthe remov'able section be fixed in place. as by screws Sti.

Pins 87 extend radially from the ring, and extend through longitudinalslots in the shell 69. A collar 89 is located about the shell and moveslengthwise along its outer periphery, and is connected with said pins soas to be moved lengthwise by said pins, said pins being shown receivedthrough holes 90 in said collar.

A block 91. shown as a segment block, is received about the outerperiphery ot the shell. and has connection, shown as a segmental tongueand groove connection 927 vith the collar 89, so as to transmit theaxial movements ot the collar 89 to said block 91, and permit rotativemovements of the housing ($6 about the shell.

The block Q1 is provided with an indicating linger 111. which is showntixcd to said block by screws 112, the indicating finger being providedwith a shank 11? received through a slot4 1M extending lengthwisethrough the housing 66.

The indicating` finger is arranged to register with the markings ot ascale 115, to indicate the adjustn'ients oi length ot stroke of thetrail-ram made by the adjusting shaft 42, when adjusting the distance otthe crank-pin fll from the ax at rotation ot the bull-wheel.

A socket-piece 121 is secured to the outer end ot the shell G9, andforms an extension of the same. The socket-piece is provided with arabbet 122, in which the outer end ot the shell is received, a shoulder123 at the end ot the rabbet mating with the outer end ot the shell.Screws 124 secure said socketpiece and the outer end of the shelltogether.

A plunger 125 is received about the outer end of the adjusting shat't42, and is rotatively held thereto, as by means ot' a key 126 receivedin a key-way 12T in said plunger and in the spline-groove T6. A spring128 is received about the huh 120 ot said plunger and is located betweenthe llange 130 ot said plunger and the bottoni wall lill otl the socket182 in the socket-piece` t'or norn'ially urging the plunger outwardly.rllhe hub of the plunger and the spring are arranged to be' received insaid socket to desirable extent.

A cap is received crosswise ot the outer end ot the socket-pimje` beine'secured thereto by screws 136, and forms an inw rdly eX- tending flangefor the outer end ot the socketpiece.

it clutch 1537, shown as a tooth clutch, has its teeth locatedrespectively on the plunger and the cap, so as to hold said plunger inangular position with relation to the socketpiece when the clutch isengaged, tor iixing the shell (i9 and the adjusting shaft 42 in rotativerelation when said clutch is engaged, and perinitti ng rotation ot theadjusting shaft with relation to the shell when said clutch itdisengaged.

The teeth ot the clutch are preferably tine teeth so that upon minuterotative adjustments of the adjusting shaft 42 with relation to theshell, and consequently with relation to the bull-wheel, being made, theteeth of the clutch will be reengagcd in new relations after suchadjustments are completed.

The outer end ot the shat't is formed to receive a suitable wrench, andthe wrench is so termed and it-y and the clutch-collar or jflunger areso related that when the wrench is connected with the adjusting shalt l2tor making an adjustment, it also releases the clutch 1b? by moving theclutch-collar 12.3 endwise and discngaging the teeth thereon from theteeth at the outer end of the shell, in order to permit the desiredrelative rotation between the operating shalt andthe shell.

Thur-f a wrench l-'tl is provided with a handle 'rlil and with asocket-piece l-l. arranged to be received about the outer end ot theadjusting shalt to sn'llicient extent to push the plunger 125 inwardly,and thi-rcb'v ois engage the clutch. the wrench being revel-veil througha hol;` 1-14 in the cap lila. The outer end ot' the adjusting shalt isshtmn as squareended` the l'rottoin end otthe rachet ot thc wrei'ichbeing' com]ilcmentallj.Y tor, iff-d to coact therewith for turning theadjusting shaft.

ln operation.. the hull-wheel rotates and carries the. crank-pin with itin its rotations` for rocking the rocke '-rrm. and consequ: lyreciprocating the tuoi-ram. The length ot stroke ot' the tool-ram isdelerminml by the distance ot the crank-pin from the axis itl() lli)tit)

ot' rotation of the bull-wheel. During rotation ot the bull-wheel, thehub 45 thereof and the bushing 4G, as well as the shell 69. thesocket-piece 121 thereof, the clutch 137, the plunger 125, the adjustingshaft 42. and the threaded collar 75, rotate with the bull-wheel, thering 8S remainingI non-rotative in its annular groove in the threadedcollar.

W'hen it is desired to adjust the stroke of the tool-ram, which may beeti'eeted while the tool-ram is reciprocating or at rest, the wrench ispushed inwardly about the outer end of the adjusting shaft forcontacting the plunger 125 and pushing the plonger inwardly andflisengaging the clutch 13T. and engaging the complementai facesy ot thewrench and adjusting shaft, whereupon rotation is imparted to theadjusting shaft 42 b v means of the wrench, in either direction,relatively to the shell (it), for rotating the screw-rod B8, and movingthe crank-pin toward or from the axis ot rotation oit the bull-wheel. inorder to cause a shorter or longer stroke of the tool-rain.

Such rotation of the adjusting shatt. Lt2 'otates the threaded collar 75with relation to the shell, thereby effecting axial movement ot thethreaded collar in desired direction along the adjusting shaft 42. byreason of the connection ot the threaded outer periphery of said collarwith the threaded inner periphery ot the shell, the extent of suchadjustment being indicated simultaneously by movement ot the indicatingfinger 111 lengthwise of the scale 115, the adjustment being continueduntil the desired length ot stroke of the tool-rain is indicated by theposition ot' the indicating finger on the scale, whereupon the wrench iswithdrawn, and the clutch is automatically reengaged in the new relationbetween the adjusting shaft, the crank-pin and the bull-wheel.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is:

1. Tn mechanism of the character described, the combination with arotative power transmitting member and an adjustable power transmittingpart thereon Vadjustable toward and from the axis of rotation of' saidpower transmitting member, of an adjusting shaft for adjusting saidpower transmitting part. said power transmitting member and saidadjusting sha't't normally rotating together. and means automaticallymaintaining said power transmitting member and said adjusting shaftl inconnected relations comprising a clutch including a clutch-collar havingoperative connection with said adjusting shaft for rotating with and formoving lengthwise of said adjusting shaft. and a coacting clutch-memberhaving` operative connection with said power transmitting member so asto rotate with said power transmitting member, means resiliently urgingsaid clutch-collar tov'a rd its eoacting clutch member for clutchengagement, a turning wrench, said turning wrench and said adjustinglshaft having complemental parts tor combined rotation of the same, andsaid turning wrench and .said clutchcollar provided with parts coactingwith each other for release of said clutch upon engagement of saidcomjgilement'al means and for engagement of said clutch upon release otsaid comlilen'icntal means.

2. ln mechanisn'i of the character described. the combination of arotative power transmitting member. a power transmitting part on saidpower transmit-ting member, means tor adjusting the distance of saidpower transmitting part from the axis ot' rotation of said powertransn'litting member comprising an adjusting shaft. a shell extendingfrom and rotatable with said power transmitting member. said adjustingshaft concentrically located in said shell, said shell provided with aflange extending toward said shaft, clutch-teeth on said flange, aclutcheollar having operative connection with said shaft so as to beslidable axially along saidv shritt and to rotate with said shaftthroughont its various axial positions along said shaft, saidclutch-collar provided with clutchteeth coniplemental to saidfirst-named clutch-teeth. resilient means causing movenient of saidclutch-collar in one` direction toward said flange for engagement of theclutch, and a rotating tool for said adjusting shaft, said clutch-collararranged to be moved into disengaged relation by said rotating tool.

3. ln mechanism ot the character described. the combination of arotative power transnlitting member, a power tansmitting part on saidpower transmitting member, and means for adjusting the distance of saidpower transmitting part from the axis of rotation of said powertransmitting member comprising an adjusting shaft whose axis of rotationis coincident with said firstnamed axis, a shell thereabout rotatablewith said power transmitting men'iber, said shell provided with asocket-piece at its outer end. said socket-piece provided with an invardly extending flange at the outer end of the socket therein. saidtiange provided with clutchteeth and a compleinental clutch collar insaid socket having operative connection with said adjusting shaft so asto rot-ate with and be movable axially along said adjur-ting shaft,resilient means in said socket normally urging` engagement of saidclutch collar with said toothed flange, and a wrench for rotating` saidadjusting sha ft. said wrench arranged to move said clutch collar intorelease relation.

lin testimony whereof, l have hereunto signed my name.

HANS BAERBALCK.

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